Westland Whirlwind electric

[tbird]

Hello everyone first post,

I've purchased this kit which is designed to use 2 x 400 brushed motors.It is my intention to use brushless motors with lipo's.

The expected AUW is 51 oz's.

Suggested prop size is 6 x 3.5 folders, any suggestions for alternatives welcome.

Look forward to any feedback.

http://www.cloudmodels.com/whirlwind.html

[tbird]

A few photo's for your info.

Edited By tbird on 22/10/2009 18:15:12

Edited By tbird on 22/10/2009 18:17:37

[001]

Hello and welcome. Having built one of these beasts, they need a lot of weight up front, you might be better using a big NiMh and brushed motors. Sorry to be negative, but there is not much room for more ballast in the nacelles and the fuselage nose is to the aft of the motors and the domed hatch is lightweight and removeable.

[Tim Mackey]

BRUSHED MOTORS

Mr Bond.....get to the back of the room, and stay on that naughty step!!

[Geoff Harris]

Why not reduce as much weight as possible in the tail.... use the lightest servos mount them up front and put some weight in the nose, don't use the rubber band hook to hook connection, maybe a couple of screws and fly something else while the lipo charges. ???????????

[Tim Mackey]

I would still alaways suggest brushless these days, and as for ballast, why not simply use a nice large capacity battery? This gives you balance, and long flight times too.

3lb+ model..... fairly fast speed required.... smallish props....how about these ?

 

Or if money is real tight... these could work too.

Remember that two of them will give you around 280 Watts.

 

If the first one is a bit too hot ( high Kv ) then finally... these.

Plenty of power and decent quality at reasonable price.

 

 

Edited By Timbo - Moderator on 22/10/2009 18:40:44

[Geoff Harris]

 I don't think money is an object with Tbird, just the right solution, and brushed = ARGHHHHHH  

Edited By Geoff Harris on 22/10/2009 18:42:30

[Geoff Harris]

   

Edited By Geoff Harris on 22/10/2009 18:41:57

[001]

Speed 480 with Rondo ESC 121 grams x 2, equivalent brushless 35g x 2 (without counting the ESC).   Surely it would be better to put heavier servos up front?

[tbird]

Hi all,

Thanks for the replies. I take note of Richard Bonds point of a lot of weight required up front on the model, but I definitely want to go the brushless route. I will have to sort the balance problem out  using other means.

[Ben Mullins]

That. Is a DREAM workshop! Very lucky man . . .

 

Looks like a nice model, like to see how it turns out

[tbird]

Thanks for the compliment on my workshop. I will keep the photo's coming.

 

[tbird]

Hi Timbo,

Will the  6 x 3.5 propellers as suggested in the kit be ok to use with the combo's you suggested?

Thanks for your input.

[Tim Mackey]

I should think so.... although you may need to increase the pitch a little with the lower Kv versions.

I like to use the largest diameter prop I can in most cases, as this increases thrust, and reduces noise. I know you said you were limited to 6".

[Simon Chaddock]

tbird

Nice looking build but is this not another version of the "Hornet" problem?

 

Rather than put weight in the nacelles is it not possible to put batteries in there instead?

 

The original design layout was driven by the fact that the RR Peregrines were by far the heaviest single fixed component - just as the batteries are in a brushless "leccy" flier.

[tbird]

For the balance problem ,I think large batteries are the way to go as you suggest. Thanks